By Topic

A CMOS Highly Linear Digitally Programmable Active-RC Design Approach

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Alzaher, H.A. ; Electr. Eng. Dept., KFUPM, Dhahran, Saudi Arabia

A new approach providing the active-RC integrator with programmable time constant is proposed. An inherently linear current division network (CDN) preserving the high linearity property of the active RC technique while providing wide tuning characteristics is adopted. The proposed integrator provides wider tuning range, and higher tuning resolution accompanied with better linearity and/or reduced area than what could be obtained from capacitor and resistor banks. The proposed integrator uses two opamps per integrator just like its MOSFET-C counterpart but it inherently exhibits better linearity and wider tuning range particularly for low voltage supply. A reconfigurable filter exhibiting complex bandpass and normal lowpass responses is realized. Experimental results obtained from a 4th-order filter fabricated in a standard 0.18 μm CMOS process are given. The complex and lowpass filters achieve in-band spurious-free dynamic ranges (SFDRs) of about 70 dB and 71 dB for bandwidths of 1 MHz and 5.5 MHz, respectively.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:58 ,  Issue: 11 )